BRAINCAKEStandard Cell Potentials Eθcell Values and Electrochemical Cells
The cell reaction is the overall chemical reaction that happens in both half cells. Oxidation takes place in one half cell and reduction takes place in the other. Each half cell has a standard electrode potential. The standard cell potential is the potential difference between the two half cells. A silver-copper cell is made by connecting together two half cells.
Cu2+(aq) + 2 e- &rlhar Cu(s) Eθ = +0.34 V
Ag+(aq) + e- &rlhar Ag(s) Eθ = +0.80 V
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Key terms in this lesson
- standard electrode potential
- The e.m.f. of a half cell compared with a standard hydrogen half cell, measured under standard conditions.
- half cell
- A system consisting of an element in two different oxidation states, in which an equilibrium is set up between the two forms.
More in Electrochemistry
- Electrochemical Cells
- The Standard Hydrogen Half Cell
- Standard Electrode Potential Eθ and the Electrochemical Series
- Calomel Electrode
- Non-Standard Conditions
- Cell Diagrams
- Thermodynamic Feasibility of a Reaction and the Extent of a Reaction
- Electrochemical Cells
All 14 lessons in Electrochemistry · All OCR A-level Chemistry topics